#pragma once
#include<iostream>
#include<time.h>
#include<stdarg.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<unistd.h>
#include<stdlib.h>
#define SIZE 1024
#define Info 0
#define Debug 1
#define Warning 2
#define Error 3
#define Fatal 4
#define Screen 1
#define Onefile 2
#define Classfile 3
#define logFile "log.txt"
class Log
{
public:
    Log()
    {
        printMethod=Screen;
        path="./log/";
    }
    ~Log()
    {

    }
    void Enable(int method)
    {
        printMethod=method;
    }
    std::string levelToString(int level)
    {
        switch(level)
        {
            case Info:
                return "Info";
            case Debug:
                return "Debug";
            case Warning:
                return "Warning";
            case Error:
                return "Error";
            case Fatal:
                return "Fatal";
            default:
                return "None";
        }
    }
    void printLog(int level,const std::string &logtxt)
    {
        switch(printMethod)
        {
            case Screen:
                std::cout<<logtxt<<std::endl;
                break;
            case Onefile:
                printOneFile(logFile,logtxt);
                break;
            case Classfile:
                printClassfie(level,logtxt);
                break;
            default:
                break;
        }
    }
    void printOneFile(const std::string &logname,const std::string &logtxt)
    {
        std::string _logname=path+logname;
        int fd=open(_logname.c_str(),O_WRONLY | O_CREAT | O_APPEND,0666);//"log.txt"
        if(fd<0)
        {
            return;
        }
        write(fd,logtxt.c_str(),logtxt.size());
        close(fd);
    }
    void printClassfie(int level,const std::string &logtxt)
    {
        std::string filename =logFile;
        filename += ".";
        filename += levelToString(level);//"log.txt.Debug/Warning/Fatal"
        printOneFile(filename,logtxt);
    }
    void operator()(int level,const char *format, ...)
    {
        time_t t=time(nullptr);
        struct tm *ctime=localtime(&t);
        char leftbuffer[SIZE];
        snprintf(leftbuffer,sizeof(leftbuffer),"[%s][%d-%d-%d %d:%d:%d]",levelToString(level).c_str(),
        ctime->tm_year+1900,ctime->tm_mon+1,ctime->tm_mday,
        ctime->tm_hour,ctime->tm_min,ctime->tm_sec);

        va_list s;
        va_start(s,format);
        char rightbuffer[SIZE];
        vsnprintf(rightbuffer,sizeof(rightbuffer),format,s);
        va_end(s);

        //格式：默认部分+自定义部分
        char logtxt[SIZE*2];
        snprintf(logtxt,sizeof(logtxt),"%s %s",leftbuffer,rightbuffer);

        //print("%s",logtxt);//暂时打印
        printLog(level,logtxt);
    }
private:
    int printMethod;
    std::string path;
};
